For exhibit developers, researchers, educators, and other museum professionals looking for ways to engage visitors more deeply with interactive science exhibits, Fostering Active Prolonged Engagement documents the exploration and findings of the Exploratorium's APE project. Both a significant contribution to visitor research and a nuts-and-bolts guide to exhibit development, this book includes 15 APE Tales (exhibit recipes with photos, drawings, and detailed construction specifications); discussions of setting explicit goals for visitors' exhibit experiences; research and evaluation methods and results; and lessons learned for building constructivist-style exhibits.